MacOS

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Apple Mac OS X is the operating system for Apple Macintosh computers on the PowerPC (PPC) and Intel x86 platform. The latest version of OS X is Snow Leopard, Build 10D571

Known versions

Mac OS X Developer Preview 2

Developer Previews

Public Beta

Apple released to the public, on September 13, 2000, a "preview" version of Mac OS X (internally codenamed Kodiak) in order to gain feedback from users, which cost $29.95. The "PB" as it was known marked the first public availability of the Aqua interface and Apple made many changes to the UI based on customer feedback. Mac OS X Public Beta expired and ceased to function in Spring 2001. However, via some commands in openfirmware on PowerPC macs with open firmware (obviously), the system clock can be altered, allowing the use of it even after Spring 2001.

Cheetah (10.0)

Puma (10.1)

Jaguar (10.2)

Panther (10.3)

Tiger (10.4)

This version of Mac OS X introduced Spotlight, the first search that can integrate into most apps. This is the first version of Mac OSX that supports Intel x86 processors, as well as PowerPC processors.

Leopard (10.5)

This version of Mac OS X introduces a lot of new features, most notably: Time Machine, to find and restore your backups when you need them, or if you just accidentaly deleted a file, and Spaces, Moving your windows into 4 (or more) personalizable spaces. The dock also got a new fuction named "Stacks", which allows an easy way of using files from folder pinned on the dock, as well it got a graphical overhaul. Like Mac OS X 10.4, it could run on PowerPC and Intel processors. It is the last release to run on PowerPC Macs.

Snow Leopard (10.6)

Requirements: Intel Core Duo or newer processor, 1 GB of RAM; latest update is 10.6.8, dropped PowerPC support

Lion (10.7)

A preview of Lion was publicly unveiled at Apple's "Back to the Mac" event on October 20, 2010. It will bring many developments made in Apple's iOS, such as an easily-navigable display of installed applications, to the Mac, and will include support for the Mac App Store, as introduced in Mac OS X Snow Leopard version 10.6.6. On February 24, 2011, the first developer's preview of Lion (11A390) was released to subscribers of Apple's developers program. The latest preview (build 11A459e) was released on May 13, 2011.

In a press release by Apple on May 31st, 2011, an announcement was made that this new release will be unveiled by Steve Jobs on June 6th at the WWDC 2011.

It was scheduled to release on Summer 2011.

This was also the last Mac OS developed before Steve Jobs died.

A Intel Core 2 Duo or newer processor and 2 GB of RAM is required.

Mountain Lion (10.8)

Released on July 25, 2012.

Basic System Requirements for OS X Mountain Lion:

•64-Bit Intel Core 2 Duo processor or better required
•Ability to boot into OS X 64-bit kernel
•Advanced GPU chipset required
•Internet connection required to download and install OS X 10.8

Macs that support OS X 10.8 Mountain Lion

•MacBook Pro – 13″ from mid 2009 or later, 15″ from late 2007 and newer, 17″ from late 2007 and newer
•MacBook Air – late 2008 and newer
•iMac – models from mid 2007 and newer
•MacBook – 13″ aluminum from 2008, 13″ from 2009 and newer
•Mac Mini – early 2009 and newer
•Mac Pro – early 2008 models and newer
•XServe – early 2009 models and newer

Macs that do NOT support OS X Mountain Lion

•Anything with an Intel GMA 950 or x3100 integrated graphics card
•Anything with an ATI Radeon X1600
•MacBook models released prior to 2008
•Mac Mini released prior to 2007
•iMac models released prior to 2007
•Original MacBook Air

Mavericks

In development